Xiangsu

You go to your girlfriends house to take a shower because something is wrong with the hot water in your house. You love your girlfriend and she is the girl you want to spend the rest of your life with. As you go in to take your shower someone comes in, but its really steamy and you can't see who. You assume its your gf and you are excited. When the door opens its her sister. She says she wants to screw you, but you don't want to. You love your girlfriend. She tells you that if you try to leave, or don't do what she says, she will yell for her sister. Do you take the chance and hope that your girlfriend would believe you?


What would you do?